Regulating valve and turbine

Abstract

A control valve for controlling a gaseous volumetric flow rate, in particular a steam volumetric flow rate, having a valve housing, a valve seat, and a valve throttle element which can be moved relative to the valve seat along a movement axis. The valve housing shapes the valve seat, and the movable valve throttle element has a throttle edge region which interacts with the valve seat. The control valve has multiple volumetric flow rate swirl elements which interact with the throttle edge region and which prevent or at least reduce shear layer instabilities in a shear layer between a wall jet region of the gaseous volumetric flow rate and a core flow region of the gaseous volumetric flow rate.

The invention claimed is: 
     
       1. A regulating valve for regulating a gaseous volume flow, comprising:
 a valve housing that forms a valve seat, and 
 a displaceable valve throttle element which is displaceable along a displacement axis relative to the valve seat and which comprises a throttle edge region which interacts with the valve seat, 
 wherein the regulating valve comprises a plurality of volume-flow swirl elements which interact with the throttle edge region and which prevent or at least reduce shear-layer instabilities in a shear layer between a wall-jet region of a gaseous volume flow and a core-flow region of the gaseous volume flow, characterized in that the throttle edge region of the displaceable valve throttle element comprises circumferentially arranged material recesses with material webs therebetween, wherein a circumferential length of a material recess of the material recesses is different than a circumferential length of a material web of the material webs, and 
 wherein the material webs are unevenly circumferentially distributed. 
 
     
     
       2. The regulating valve as claimed in  claim 1 ,
 wherein the plurality of volume-flow swirl elements are arranged on the throttle edge region of the displaceable valve throttle element concentrically around the displacement axis. 
 
     
     
       3. The regulating valve as claimed in  claim 1 ,
 wherein the throttle edge region of the displaceable valve throttle element is formed asymmetrically on a side facing the valve seat. 
 
     
     
       4. The regulating valve as claimed in  claim 1 ,
 wherein the throttle edge region of the displaceable valve throttle element is formed asymmetrically circumferentially. 
 
     
     
       5. The regulating valve as claimed in  claim 1 ,
 wherein the material recesses and/or the material webs face the valve seat. 
 
     
     
       6. The regulating valve as claimed in  claim 1 ,
 wherein the throttle edge region of the displaceable valve throttle element comprises a serrated crown shape on a side facing the valve seat. 
 
     
     
       7. The regulating valve as claimed in  claim 1 ,
 wherein the gaseous volume flow is a steam volume flow. 
 
     
     
       8. A turbine comprising
 a multiplicity of valve devices, 
 wherein at least one of valve device of the multiplicity of valve devices comprises a regulating valve as claimed in  claim 1 . 
 
     
     
       9. The turbine as claimed in  claim 8 ,
 wherein the turbine is a steam turbine. 
 
     
     
       10. A regulating valve, comprising:
 a valve housing that forms a valve seat; 
 a valve throttle element which is displaceable along a longitudinal axis relative to the valve seat and which comprises a throttle edge region, 
 a plurality of swirl elements disposed on the throttle edge region or on the valve seat and configured to guide a flow of steam flowing between the throttle edge region and the valve seat; 
 wherein swirl elements of the plurality of swirl elements are unevenly circumferentially distributed about the longitudinal axis, and 
 wherein adjacent swirl elements form a respective flow path therebetween, and wherein adjacent flow paths comprise same flow path heights. 
 
     
     
       11. The regulating valve of  claim 10 , wherein the swirl elements comprise various circumferential lengths. 
     
     
       12. The regulating valve of  claim 10 , wherein the swirl elements are disposed on the throttle edge region. 
     
     
       13. The regulating valve of  claim 10 , wherein the swirl elements are disposed on the valve seat. 
     
     
       14. A regulating valve, comprising:
 a valve housing that forms a valve seat; 
 a valve throttle element which is displaceable along a longitudinal axis relative to the valve seat and which comprises a throttle edge region, 
 a plurality of swirl elements disposed on the throttle edge region or on the valve seat and configured to guide a flow of steam flowing between the throttle edge region and the valve seat; 
 wherein swirl elements of the plurality of swirl elements are unevenly circumferentially distributed about the longitudinal axis, and 
 wherein recesses between adjacent swirl elements comprise various circumferential lengths.